DOCTORS SAY IS AN ALARMING TREND. REPORTER: PEOPLE UNDER THE AGE OF 45 ARE STILL IN THE MINORITY OF CASES. BUT DOCTORS SAY THE NUMBERS ARE GOING UP AT AN ALARMING RATE. >> IT WAS A SURPRISE AND A SHOCK BECAUSE NOBODY IN OUR FAMILY HAS BEEN THROUGH IT. REPORTER: MARCI COOKE WAS JUST 37 WHEN SHE WAS DIAGNOSED WITH STAGE THREE COLON CANCER. SHE